A160949 a(n) = n - digital sum(n+1).

-1, -1, -1, -1, -1, -1, -1, -1, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 53, 53, 53, 53, 53, 53, 53, 53, 53, 53, 62, 62, 62, 62, 62

Offset

1,9

Links

Paolo Xausa, Table of n, a(n) for n = 1..10000

Formula

a(n) = n - A007953(n+1). - R. J. Mathar, Mar 04 2026

Example

a(8) = 8 - ds(9) = 8 - 9 = -1.
a(15) = 15 - ds(16) = 15 - (1 + 6) = 15 - 7 = 8.
a(26) = 26 - ds(27) = 26 - (2 + 7) = 26 - 9 = 17.

Mathematica

Table[n-Total[IntegerDigits[n+1]], {n, 80}] (* Harvey P. Dale, May 19 2018 *)

Crossrefs

Cf. A007953, A017257.

Sequence in context: A010731 A048762 A201053 * A245401 A048763 A088841

Adjacent sequences: A160946 A160947 A160948 * A160950 A160951 A160952

Keyword

base,sign,easy

Author

Claudio Meller, May 30 2009

Status

approved